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<p>Photovoltaic (PV) installations and intensive aquaculture (AC), are increasingly common practices within subsidence lakes, potentially exacerbating aquatic environmental pollution and posing significant challenges for regional environmental management. However, their ecological consequences on bacterial communities remain poorly understood. Here, we investigated bacterial diversity, taxonomic composition, and ecological stability across three different habitats (REF, PV and AC) in subsidence lakes by high-throughput 16S rRNA sequencing. Our study elucidates significant habitat-specific shifts, with bacterial diversity and ecological complexity markedly reduced in PV habitats compared to reference subsidence lakes (REF), whereas ecological stability was enhanced. In contrast, AC habitats exhibited the lowest bacterial diversity and stability but the highest ecological complexity. Lower diversity in PV habitats primarily resulted from reduced dissolved oxygen, and stabilized environmental conditions. Conversely, nutrient enrichment (TN and TP) driven by aquaculture activities intensifying ecological network complexity but weakening stability due to over-dependence on dissolved organic matter (DOM). Our results highlight the critical ecological trade-offs induced by anthropogenic activities, providing important implications for managing microbial biodiversity and ecosystem functions in anthropogenically impacted lake environments.</p> Graphical Abstract <p></p>

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Photovoltaic and Aquaculture Environments Consistently Reduce Bacterial Diversity but Divergently Influence Ecological Stability: New Insights from Subsidence Lakes

  • 期刊论文

  • 发表日期：

    2026年1月30日

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  • Xingchen Li,
  • Lei Zhang,
  • Yijie An,
  • Sixu Gu,
  • Feng Xu,
  • Hua Cai

摘要

Photovoltaic (PV) installations and intensive aquaculture (AC), are increasingly common practices within subsidence lakes, potentially exacerbating aquatic environmental pollution and posing significant challenges for regional environmental management. However, their ecological consequences on bacterial communities remain poorly understood. Here, we investigated bacterial diversity, taxonomic composition, and ecological stability across three different habitats (REF, PV and AC) in subsidence lakes by high-throughput 16S rRNA sequencing. Our study elucidates significant habitat-specific shifts, with bacterial diversity and ecological complexity markedly reduced in PV habitats compared to reference subsidence lakes (REF), whereas ecological stability was enhanced. In contrast, AC habitats exhibited the lowest bacterial diversity and stability but the highest ecological complexity. Lower diversity in PV habitats primarily resulted from reduced dissolved oxygen, and stabilized environmental conditions. Conversely, nutrient enrichment (TN and TP) driven by aquaculture activities intensifying ecological network complexity but weakening stability due to over-dependence on dissolved organic matter (DOM). Our results highlight the critical ecological trade-offs induced by anthropogenic activities, providing important implications for managing microbial biodiversity and ecosystem functions in anthropogenically impacted lake environments.

Graphical Abstract